Nailing-machine for boots and shoes



m e e h s M e e h S 3 T T I R R E M E a d 0 M 0 NAILING MACHINE FORBOOTS AND SHOES. No. 251,453.

Patented Dec. 27,1881.

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E. MERRITT.

NAILING MACHINE 011 BOOTS AND SHOES. No. 251,453. Patented Dec, 27.1881.

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E, MERRITT.

NAILING MACHINE POE BOOTS AND SHOES.

No. 251,453. Patented Dec. 27,1881.

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UNITED STATES "PATENT OFFICE.

EDWARD MERRI'IT, OF BROCKTON, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS,TO DUNBAR, HOBART 8t VHIDDEN, OF SOUTH ABING- TON, MASSACHUSETTS.

NA ILING-MACHINE FOR BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 251,453, dated December27, 1881. Application filed October 17, 1881. (No 11101161.)

To all whom it may concern:

Be it known that I, EDWARD MERRITT, a citizen of the United States,residing at Brockton, in the county of Plymouth and State ofMassachusetts, have invented certain new and useful Improvements inNailing-Machines for Boots and Shoes; and I do hereby declare that thesame are fully described in the following specification and illustratedin the accompanying drawings.

On the accompanying drawings, Figure 1 represents a front elevation ofthe machine. Fig. 2 represents aside elevation, seen from X in Fig. 1.Fig. 3 represents a central longitudinal section over the driving-shaftand driver-bar of the machine. Fig. 4 represents a sectionalfrontelevation of the head and the driver and awl bars. Fig.5 representsa crosssection of the nail-receptacle on the line A 3,;

shown in Fig. 1. Fig. 6 represents a crosssection of the saidnail-receptacle on the line' (3 D, shown in Fig. 2. Fig. 7 represents across-section'of the nail picker on the line EF,

shown in Fig. 2. Fig. 8 represents a plan view of the perforatednail-rest. Fig. 9 represents a plan view of the nail-raceways and j theribbed shield. Fig. 10 represents a detail view of the awl-bar, and Fig.11 represents a side view of the nails to be driven. Fig. 12 is adetailsectional view of the raceway; and Fig. 13 shows a cross-sectionof the raceways on the line I H, shown in Fig. 9.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

a is the frame of the machine, having V- shaped horizontal guides to afor the laterally-movable head I), as will be more fully described.

c is the drivingshaft, movable in hearings in the frame a, and providedwith fast and loose pulleys c c in the usual manner.

To the shaft 0 is secured a grooved face-cam,

d, by means of which the vertical rod d is' moved up and down, it beingfor this purpose provided in its upper end with a pin and roll,

' d, projecting into the groove of the cam d.

The rod dhas its bearing in the frame a, as

shown in Fig. 3, and it is jointed in its lower end to the rocker-bar d,that is movable on the fulcrum d", and provided in its forward end witha foot or rest, (1", for carrying the workthe rocker-lever d is anadjustable gage, d,

for the purpose of gaging the distance of the nail to be driven from theedge of the shoesole, the advantage of which arrangement is that thegage d follows the work, so that it can be used to equal advantage onany thickness of leather.

On the driving-shaft c is another grooved face-cam, e, that operates arocking lever, e, hung at c to the upper part of the frame a, andprovided with a pin and roll, 6', fitting within the groove of the came. The lower end of the levere is provided with an adjustable connectingdevice consisting of a screw, 0 and adjustable block 0", which iscapable of vertical adjustment within the upper end of the lever f,which is secured to a horizontal rocker-sl1aft,j", supportedin a bearingin the frame a. 7

Tothe forward end of the rocker-shaftf is secured a rocker-lcver,j", inthe upper end of which is a movable block,f, movable within acorresponding slot in said lever f, as shown in Fig. 4. A pin or stud, fsecured to the movable head 1), passes through a correspondingperforation in the movable block f, by which arrangement a horizontalreciprocating motion is imparted to the head b from the driving-shaft cfor the purpose of feeding the work. The desired amount of feed isadjusted by means of the connecting device a and c", which unites therocker-levers c and f, as shown in Fig. 2.

On the driving-shalt o is a face-cam, g, which operates a rock-lever, 9,(shown in dotted lines of Fig. 3,) hung on the fulcrum g and carried din by a spring, 9'. The lower end of the lever '9 is hinged to .asliding block, 9, (shown in Fig. 7,) to which the wedge-shaped-nail-sep5 arator g" is attached, as well as an adjustable spring-gage bar, 9",to regulate for the use of various sizes of nails. The spring-gage g isadjusted by means of a set-screw, g passing through the sliding block9*", the latter being guided in a grooved bracket, G, secured to theunder side of the frame a in its forward end. The said bracket G has arecess, G, in its forward end for receiving the nail when forced fromthe raceway by the wedge-shaped separator g". To the under side of theaforesaid bracket G is secured a rest, h, for the point of the nail,which has a perforation, h, (shown in Fig. 8,) through which the nailpasses into the throat i, the point resting against the awl when down.The awl rising above the throat 1' allows the nail to drop through thethroat,

and is driven by the driver 1 into the hole in the sole previously madeby the awl. The throat i is secured to the lower part of the movablehead b, and has a countersink, i, in the upper part of it for receivingthe nail when delivered from the recessed bracket G, through anintermediate tube, G, secured to the throatbracket I between therecessed end of the separator-bracket G and its lower rest, it. Thethroat"; has a corrugated under surface, 1;, to hold the work in placeand to prevent it from slipping, as usual.

I is the driver secured to the lower'endof the driver-bar l, which ismovable up by means of a cam, Z, on the driver-shaft c, and a roll andpin, 1', on the driver-bar l, and it is driven down by means of a coiledspring, I, as usual, surrounding the driver-bar, between its collar 1"and the upper bearing, b, secured to the head I). The driver Z is madeof spring-steel, so as to allow the awl-bar 7a to force it from itscenter while the a-wl-bar is being forced down to penetrate the soleprevious to feeding the shoe and driving the nail.

The awl 70 is secured to the lower end of the awl-bar 7c, and is movableup and down in an enlarged groove, 1), in the movable head b, to permita lateral motion to it for the purpose of allowing'the awl to enter orpass down through the throat i into the work to be fed. When beingraised it is carried out ofline of the throat z to allow the driver I toenter said throat. When going down it forces the driver I to one side ofthe opening in the throat to allow the awl to pass through such opening.

The awl-bar It is raised by means of a cam, k", on the drivingshaft 0,acting on a pin and roll, k, on a rocker-lever, 7c", (shownin dottedlines in Fig. 4,) hinged to a fulcrum-pin, k, in the movable head I).

end, and through said block passesia pin, 70",

into the awl-bar It, to which it is secured. The

The lever It has a laterally-movable block, it, in a slot in its free Tothe frame a, on each side of the movable head I), is secured a spring,a, that acts as an elastic stop or cushion for the head I) when nearlyapproaching the end of its stroke in either direction, so as to preventthe shock on thehead b and its connecting mechanism caused by themomentum of its parts.

0 isthe stationary nail-reservoir for the nails, and is' provided with acentral bearing-sleeve, 0, for the hopper-shaft 0", which is set in arotary motion by means of a pulley, O, on the driving shaft 0, and abelt, 0, leading to a pulley, O, on' the hopper shaft 0". To the frontof the hopper-shaft o is secured a perforated disk, 0', having anannular rim, 0", projecting within the open end of the reservoir 0, andto the inside of said rim are secured or cast in one piece the hoppers 00", or nail-lifters,-by which the nails are raised from the receptacleoand delivered to the ribbed shield 19, having ribs pp p, for thepurpose of properly delivering the nails into the space q, between theraceways q q, the latter being provided with a stationary cover, Q, toprevent the nails from jumping out of the raceways while being fed downtoward the picker. The annular rim 0 on the perforated hopper- Wheel 0is to prevent the points of the nails or slivers'from wedging betweenthe hoppers o and the curved wall of the receptacle 0. The

receptacle 0 is provided in front with a partial cover, 1, having anopening, 9*, at the top, through which the proper working of thehoppers0 can be ascertained, and also to clear the raceways q q, in case theyshould be clogged up.

1' is an apron 011 the partial front plate, 1',-

which' is for the purpose of receiving any nails that may be thrown outby the hoppers through the rotary perforated disk 0, and to conduct themback into the rcservoiro. The front plate,

a, is adjusted to and from the perforated disk 0 byineans of screws r",screwed into the flange'of the reservoir 0, and passing through hollowscrews 1', screwed through the plate or cover 1', asshown in Fig. 5, soas to be able to set up the plate or cover 1' to the rotary perforateddisk 0 as close as possible without binding. The rotary disk 0' isprovided with ratchetteeth or projections 0" 0", acting on ahammer-lever, 8, provided with the usual spring, and having a hammer, 8,adapted to strike one of the raceways q, so as to start the nails ontheir way to the driver and to prevent their clogging' or sticking inthe raceways.

The operation of the machine is as follows: After the shoe t'is placedon the last on its usual jack and held up against'the throat of themachine, the awl 7c descends-and is forced by the cam-groove m. on theface-plate m in a line with the opening in the throat, and at the sametime through the throat into the shoe, and when the awl reaches itslowest position the head I), awl 7c, and shoe t move together thedistance of one nail from another, and at the time the head 71 reachesthe limit of its stroke toward the nail-reservoir 0 the nail drops'throu gh the perforation 'h in the lower nail-rest,

h, when the point of the nail is resting against the side of the awl 7a,which is still in the throat i,' and at this time a nail is taken fromthe end of the raceways by the wedge-shaped picker g" and confined inthe recess G of the bracket G. The awl it now ascends by: means of itslifting-cam It, allowing the nail to drop directly through the throat zinto the perforation made in the leather by the chisel-shaped andcountersunk awl It, by which the point of the nail is perfectly centeredin line with thethroat.

The driver Znow descends through the throat t'and drives the nail andclinches it against the metal cover of the last of the boot. During thedescent of the awl it springs the lower end of the driverl to one sideenough to allow the awl to enter the throat t'. After the nail is driventhe rocking foot cZY descends and carries the shoe t below from contactwith the corrugated surface 1' of the throat t'. The driver-bar 1 thenbegins to rise and the head I) to move back to its original position,and when reached the foot (1" ascends and the shoe t is brought to bearagainst the throat-surface i, and the nail is allowed to drop in theintermediate tunnel, G, its point resting against the lower nail-rest,h, until the awl it again descends.and' the head I) is fed toward thenailreservoir 0, when the nail again rests against the awl k preparatoryto dropping into the throat i and hole in the shoe, to be driven by thedriver 1, and so on.

As shown in Fig. 10, the point K is made chisel-shaped, so as tomakeahole in the leather corresponding to the shape of the nail shown inFig. l1,by which the nail is properly directed into the hole made in theleather without the aid of spring-dies, as heretofore used, and bymaking the hole in the leather with a chiselshaped bottom, by the meansabove described, I am able to determine a uniform position in which thenails are to be clinched in the shoesole. The upper end, K, of the awlthat enters the leather is made with a countersink, as shown in Fig. 10,corresponding to' the head of the nail, as shown in Fig. 11, by whichaconical recess is made in the upper part of the shoesole, for thepurpose of guiding the point of the nail when entering the leather, andalso for receivingthe countersink head of the nailwhen driven, toprevent the surface of the leather around the head of the nail frombeing forced below the surface of the sole, which would be the case ifthe nail were to be driven into a straight hole.

In connection with the lever g, which operates the wedge-shaped pickerg", is attached a wedge-shaped wire, a, which passes under spring a onraceway-s q q, and allows the nails to pass down'the raceways againstthe springgage 9" when the separator g" is withdrawn, and at the instantthe separator begins to pass in the wedge a passes from under thespringv and allows the v-shaped head c on the end of the spring 12 toforce down between the heads of the first and second nails, by whichtheir points are forced apart, as shown in Fig. 12,

and allows the wedge-picker g" to enter and separate the nails for thepurpose of insuring a positive and uniform delivery of the nails.

Having thus fully described the nature, constructiou, and operation ofmy invention, wish to secure by Letters Patent, and claim- 1. In anail-driving machine, the combination of the rotary driving-shaft c,grooved cam d,vertically-movable rod d d, and the rocking lever 11',with its foot or rest (1", as and for the purpose set forth.

2. In a nail-driving machine, the combination of the rocking lever andits foot or rest (1" with the adjustable gage d, as and for the purposeset forth.

3. In a nail-driving machine, the combination of the rotarydriving-shaft c, grooved cam e, rocking levers e and f, with theiradjustable connecting device 0 a shaft f, leverf, and connecting devicef'f to the laterally-movable head I), as and for the purpose described.

g, and spring g, bracket Gr, and wed ge-shaped nail-separator g", as andfor the purpose set forth.

6. In combination with the bracket G and wed ge-shaped nail-separatorg", the adjustable spring-gage g" and set-screw 9", as and for thepurpose set forth.

7. In a na-il driving machine, the combination of the bracket G, itsrecess G, intermediate tube, G, and lower perforated nail-rest h h, asand for the purpose set forth.

8. In a nail-driving machine, the combination of the driving shaft 0,movable head I), cam 70', lever k", and its connection It 70" to thevertically and laterally adjustable awl-bar it, having awl k and coiledspring 79, as and for the purpose set forth.

9. In a nail-driving machine, the verticallyadjustable awl-bar k, withits stud and roll m, in combination with the cam groove m" in theface-plate m, for the purpose of imparting a lateral motion to saidawl-bar and its awl k, as herein set forth and described.

10. In a nail-driving machine, the nail-receptacle 0, having centralsleeve bearing, 0, in combination with the rotary shaft 0, itsperforated hopper-wheelo, with its annular rim 0, and hoppers 0" 0", asand for the purpose set forth.

11. In a nail-driving machine, the combination of the nail receptacle 0,rotary hopperwheel 0' 0 0 0", the partial front plate, 1, andadjusting-screws 1" W, as and for the purpose set forth.

12. In anail-driving machine, the nail-receptaeie 0, rotary hopper-wheel0 0 0" 0*, partial front plate, 1', and apron r, as and for the purposeset forth.

13. In a nail-driving machine,thenaiI-recep- 5'tacie0,rotaryhopper-wheel 0 0 0", raceways q q, and plate 0, with itsribs ppp, as and for the purpose setforth.

14. In a naiLdriving machine, the awl k, having chisel-point K andcountersink K, as and It for the purpose set forth.

15. In a nail-driving machine, the combination of raceways q q, thestationary cover Q, the spring 12, with its V -shaped lip 12, andwedge-shaped rod u, as and forthepurpose described.

In testimony whereof I have aflixed my sig nature in presence of twowitnesses.

ED WARD MERE ITT.

Witnesses:

ALBAN ANDREN, HENRY UHADBOURN.

